Method and device for downloading and storing program package component

The invention relates to the technical field of intelligent cards, and discloses a downloading and storing method and device for a program package component, and the downloading and storing method comprises the steps: analyzing a data block of a downloaded program package, and obtaining a plurality of functional components; analyzing a head component in the plurality of functional components, combining the head component with the local packet table, and writing the addresses and sizes of the other functional components into the local packet table of the Java card virtual machine; in the packet downloading and analyzing process, the combined local packet table is stored in a random access memory, and the local packet table is written into a nonvolatile memory after analysis is completed; and writing a constant pool component in the plurality of analyzed functional components into a nonvolatile memory to replace the global reference table, and writing related information of the rest functional components into t